Phyllomya gibsonomyioides Crosskey, 1976

Shima, Hiroshi, Zhang, Wenxia & Tachi, Takuji, 2022, A systematic study of Old World Phyllomya Robineau-Desvoidy (Diptera: Tachinidae), Zootaxa 5099 (4), pp. 401-449 : 423-424

Phyllomya gibsonomyioides Crosskey, 1976

( Figs 11 , 18 , 27 , 61 , 78 , 110 , 135–136 )

Phyllomya gibsonomyioides Crosskey, 1976: 73 . Holotype male (NHMUK, examined). Type locality: India.

Diagnosis. Body length: 8.5–10.0 mm. Head almost holoptic in male dichoptic in female; antennal pedicel with a long seta almost as long as postpedicel; arista long plumose; 0–1 presutural and 0 postsutural acrostichal setae; 2 presutural and 3 postsutural dorsocentral setae; 2 katepisternal setae; second costal sector bare above, haired below; mid tibia with 2 anterodorsal setae; hind tibia with 2 preapical dorsal setae; abdomen with thin, bluish-gray pruinosity on entire dorsum; male 5th abdominal sternite angulated but not pointed at postero-interior corner of posterior lobe.

Redescription of male. Head holoptic; arista long plumose, total width including plumosity wider than postpedicel; palpus dark brown to black; 0–1 presutural and 0 postsutural acrostichal seta; 2 presutural and 3 postsutural dorsocentral setae; 2 postsutural intra-alar setae, anterior seta very fine; 2 postsutural supra-alar setae, posterior seta absent; 2 katepisternal setae; costa bare above except 1st costal sector, haired below; basal scutellar setae slightly longer than scutellum; mid tibia with 2 anterodorsal setae; hind tibia with 2 preapical dorsal setae; claws and pulvilli long; abdomen with thin, bluish-gray-white pruinosity; abdominal syntergite 1+2 without discal setae, 3rd to 5th tergites without lateral discal setae; 5th sternite with posterior lobe angulated but not pointed on postero-interior corner. Terminalia: Sixth tergite entire; surstylus broad, weakly narrowed at apical 1/4 to a truncated apex, with rather long hairs; cerci in dorsal view narrowed on basal 1/3, parallel-sided to apical 1/4, then narrowed to apex, narrowly separated along apical 1/3, without a mid-dorsal suture along basal 1/3, in lateral view only weakly curved ventrally along apical 1/4, apex weakly flexed; pregonite flat; postgonite not extending beyond apex of epiphallus; epiphallus long, about 1/2 as long as basiphallus; dorsal sclerite of distiphallus flat, distal membranous portion about 2/3 as long as dorsal sclerite.

Description of female. Head rounded, dichoptic, occiput well bulged; vertex about 0.28 of head width; outer vertical seta about 1/2 as long as inner vertical seta; prevertical seta outwardly-directed, as long as outer vertical seta; ocellar setae slightly shorter than prevertical seta; 2 proclinate orbital setae, anterior seta stronger, about 2/3 as long as inner vertical seta; fronto-orbital plate with 2–3 rows of rather sparse, fine, short hairs; parafacial narrowed below, about twice as wide as postpedicel at mid height, with 1–2 rows of fine, short, sparse hairs; gena about 1/3 of eye height; genal dilation absent; base of antenna nearly level with lower 1/3 of eye height; pedicel with 2 long setae distinctly longer than postpedicel; arista long plumose, total width including plumosity slightly wider than postpedicel. Thorax with thin, pale bluish-gray pruinosity, 3 narrow median vittae fused anteriorly, 2 broad lateral vittae visible on presutural area of scutum and a broad median vitta on postsutural scutum. Abdomen with thin, pale bluish-gray pruinosity on entire dorsum; syntergite 1+2 to 5th tergite each with a row of strong marginal setae, 3rd to 5th tergites with a pair of discal setae and without lateral discal setae. Terminalia: Sixth tergite entire, concave middorsally on anterior margin, with strong setae marginally; 6th sternite with short hairs on posterior 1/2; 7th tergite narrowly divided into 2 hemitergites, about 1/2 as long as 6th tergite, with a row of marginal setae; 7th sternite as long as 6th, with several hairs on submedian portion and several short marginal setae; 8th hemitergite short, fused with hypoproct on upper posterior portion.

Description of first instar larva. Body length 1.1–1.3 mm; cephaloskeleton rather broad on anterior portion, dorsal margin very weakly convex at basal 2/5; 2nd thoracic segment with 5–6 anterodorsal row of spinules; 7th abdominal segment with several rows of posterodorsal spinules, rows decrease in number mid-dorsally, very close to posteroventral rows of spinules ventrally.

Type material examined. Holotype ♂: India ( NHMUK) . Paratypes: 1 ♂, Simla , India, 20–28.vii.1918 ; 1 ♀, India (both NHMUK) .

Additional material examined. Nepal: 1 ♀, Solukumbu , Jili to Bandar, 1950–2150 m, 25.vii.1992, H. Shima ( KUM) ; 1 ♀, Solukumbu , Bandar to Sete, 1540–2574 m, 26.vii.1992, S. Shinonaga ( KUM) .

Distribution. Nepal, India (Assam, Himachal Pradesh).

Remarks. The female was not known when the species was originally described. We found females from Nepal that are similar to the male except for the dichoptic head, and which we consider conspecific as described above. This species is similar in general appearance to P. aristalis from Japan.

Figures

FIGURES 8–11. Female terminalia of Phyllomya spp., lateral view. 8. P. annularis (Villeneuve). 9. P. arctogena Shima & Tachi, sp. nov. 10. P. chaoi Shima & Zhang, sp. nov. 11. P. gibsonomyioides Crosskey. Scale bars: 0.1 mm.

FIGURES 12–20. Epandrium, surstylus and cerci of Phyllomya spp., lateral view. 12. P. albipila Shima & Chao (after Shima & Chao 1992). 13. P. angusta Shima & Chao (after Shima & Chao 1992). 14. P. annularis (Villeneuve). 15. P. aristalis (Mesnil & Shima) (after Mesnil & Shima 1978). 16. P. elegans Villeneuve. 17. P. formosana Shima (after Shima 1988). 18. P. gibsonomyioides Crosskey. 19. P. gymnops (Villeneuve). 20. P. humilis Shima (after Shima 1988). Scale bars: 0.1 mm.

FIGURES 21–29. Epandrium, surstylus and cerci of Phyllomya spp., dorsal view. 21. P. albipila Shima & Chao (after Shima & Chao 1992). 22. P. angusta Shima & Chao (after Shima & Chao 1992). 23. P. annularis (Villeneuve). 24. P. aristalis (Mesnil & Shima) (after Mesnil & Shima 1978). 25. P. elegans Villeneuve. 26. P. formosana Shima (after Shima 1988). 27. P. gibsonomyioides Crosskey. 28. P. gymnops (Villeneuve). 29. P. humilis Shima (after Shima 1988). Scale bars: 0.1 mm.

FIGURES 59–63. Hypandrium, pre- and postgonite and phallus of Phyllomya spp., lateral view. 59. P. elegans Villeneuve. 60. P. formosana Shima (after Shima 1988). 61. P. gibsonomyioides Crosskey. 62. P. gymnops (Villeneuve). 63. P. humilis Shima (after Shima 1988). Scale bars: 0.1 mm.

FIGURES 73–78. Male 5th sternite of Phyllomya spp., ventral view. 73. P. albipila Shima & Chao (after Shima & Chao 1992). 74. P. annularis (Villeneuve). 75. P. aristalis (Mesnil & Shima) (after Mesnil & Shima 1978). 76. P. elegans Villeneuve. 77. P. formosana Shima (after Shima 1988). 78. P. gibsonomyioides Crosskey. Scale bars: 0.1 mm.

FIGURES 101–111. Adult habitus/male head of Phyllomya spp., left lateral view. 101. P. albipila Shima & Chao. 102. P. annularis (Villeneuve). 103–104. P. arctogena Shima & Tachi, sp. nov. 105. P. aristalis (Mesnil & Shima). 106–107. P. chaoi Shima & Zhang, sp. nov. 108. P. elegans Villeneuve. 109. P. formosana Shima. 110. P. gibsonomyioides Crosskey (female). 111. P. gymnops (Villeneuve).

FIGURES 127–138. First instar larva and cephaloskeleton of Phyllomya spp., lateral view. 127–128. P. annularis (Villeneuve). 129–130. P. arctogena Shima & Tachi, sp. nov. 131–132. P. aristalis (Mesnil & Shima). 133–134. P. chaoi Shima & Zhang, sp. nov. 135–136. P. gibsonomyioides Crosskey. 137–138. P. gymnops (Villeneuve).Abbreviations: T2 and T3 = thoracic segments 2 and 3. A1 to A7 = abdominal segments 1 to 7.